knight



Patented Feb; 5, 1884.

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ATTORNEYS.

WITNESSES: S )6. 51W

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UNITED STATES" PATENT 1 OFF-ion.

MARK N. KNIGHT, OF SKOlVHEGAN, MAIA'E.

SCAFFQLDlNG-BRACKET.

SPECIFICATION forming partof Letters Patent No. 293,040, dated February 5 1884.

Application filed April 23, 1883.

' State of Maine, have invented a new and Improved Scaffolding-Bracket,of which the fol- .lowing is a full, clear, and exact description.

The object of my invention is to provide a new and improved bracket for making scafiolding in rooms, on roofs of buildings, for erectframe provided with adj ustable cross-bars.

ing staging, stands, temporary platforms, &c., which bracket is very simple in construction, strong and durable, and can be used for vari ons purposes.

The invention consists in a bracket for scaffolding formed of two pieces of timber having notched edges,one of which pieces is provided at the upper end with a pivoted link through which the outer piece of timber can be passed, or which link passes through a slotin the other piece of timber. The pieces of timber are braced by links united by a chain or by bars; or the pieces of timber can be braced by a Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a longitudinal elevation of my improved bracket. Fig. 2 is a perspective view of a modified construction of the brace for thesa-me. Fig. 3 is a perspective viewof another modification of the brace. Fig. Ais a perspective view of the foot of one of the pieces of timber. y

A piece of timber, A, is provided at one end with a longitudinal slot, B, which is provided in one edge with a series of notches, a. Below the said slot the edge of the piece of timber A is provided a series of notches, b. If desired, the piece of timber A can. be provided with the notches I) along the entire edge, and in that. case the slot B, provided with the notches a, can be dispensed with, the notches b in the upper part of the piece of timber A serving for the same purpose as the notches a in the slot B. A piece of timber, O, is provided in one edge'with a series of notches, c. and to its upper end is pivoted a U-shaped link, D, which passes through the slot Bin the piece of timber A, and is adapted to be moved up and down in the same, the crosspiece of the said link D being adapted to be i gated quadrangular frame, J, is provided, the

in place.

formed, for the frame J prevents the pieces A S (No model.)

passed into the notches a, whereby the upper end of the piece of timber G can be held at any desired height on the piece of timber A. the piece A is provided with the notches to the top, the piece A passes through the link D, which then catchesin the notches b of the piece A. Both the pieces A and G are pro vided at their lower ends or feet with a pronged plate, I, projecting laterally from one of the sides of the pieces A and O at the lower ends of the same, as shown in Fig. 5. To prevent the pieces Aand C from spreading, they must be suitably braced. means of two {links, F F, through which the pieces A O are passed, and which links are united by a chain, G. The links are then passed into suitable notches, b andl c, of the pieces A C, respectively, as shown in Fig. 1, a holding them at the desired inclination. In the modification shown in Fig. 2 the links F are united by two bars, 11, pivoted thereto. In the modification shown in Fig. 3 an elonend pieces of which rest in the notches b and 0, respectively. Adjustable cross-pieces K, provided with clamping-nuts L, are mounted to slide on the frame J, and can be locked in the desired position on the same. The pieces A G are to be braced by means of the frame .T. The clamping-bars K are placed against the inner sides of the pieces A O, and are clamped A very stiff scaffolding is thus 0 from spreading, and the cross-pieces K prevent them from folding together. By means of the above-described device various kinds of scaffolding, framing,staging, &c., can be easily and rapidly erected on flat and steep roofs, either at the peak, over thepeak, or at the eaves, upon a wall, in a room, &c. The bracket canalso be'used for erecting tem-. porary platforms in theaters for supporting scenery, and in all places where removable 9 scaffolding and staging are required. The bracket can be folded very compactly for transportation, and the scaffolding and staging can be erected without requiring any nailing, hammering, screwing, inserting of bolts, tightening of nuts, &c., and the bracket is so adj ustable that it can be used for a number of purposes.

Having thus fully described my invention,

This is accomplished by, 6

IOO

I claim as new and desire to secure by Letters Patent- 1. The combination, with the piece A, provided with the notches a b, of the piece 0, pro- 5 vided with notches c, and of the U-shaped link D, pivoted to the upper end of the piece 0, substantially as herein shown and described, and for the purposes set forth.

2. The combination, with the piece A, pror0 vided with the slot B and with the notches a b, of the piece 0, provided with notches c, and of the link D, pivoted to the upper end of the piece 0 and passed through the slot B, substantially as herein shown and described, and I 5 for the purpose set forth.

3. The combination, with the notched pieces A C, adjustably hinged together, of a brace having links or loops engaging the notches of the said pieces, substantially as herein shown and described. 20

4. The combination, with the piece A, provided with the notches b, and the piece 0, provided with the notches c, of the link D, the links F, and the bars H, uniting them, substantially as herein shown and described, and 25 for the purpose set forth.

MARK N, KNIGHT.

Witnesses: I

ALVIN SEDGLEY, ALFRED J OHNSOX. 

